docs: add links to new Settings dev guide

Change-Id: I04444ec0c4c1c278569b64f15cbbc7e8c1c623cd

core/java/android/preference/Preference.java

@@ -55,6 +55,13 @@ import java.util.Set;
  * {@link SharedPreferences}. It is up to the subclass to decide how to store
  * the value.
  * 
+ * <div class="special reference">
+ * <h3>Developer Guides</h3>
+ * <p>For information about building a settings UI with Preferences,
+ * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a>
+ * guide.</p>
+ * </div>
+ * 
  * @attr ref android.R.styleable#Preference_icon
  * @attr ref android.R.styleable#Preference_key
  * @attr ref android.R.styleable#Preference_title

core/java/android/preference/PreferenceActivity.java

@@ -85,6 +85,13 @@ import java.util.List;
  * + fragments" mode rather than the old style of just showing a single
  * preferences list.
  * 
+ * <div class="special reference">
+ * <h3>Developer Guides</h3>
+ * <p>For information about using {@code PreferenceActivity},
+ * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a>
+ * guide.</p>
+ * </div>
+ *
  * <a name="SampleCode"></a>
  * <h3>Sample Code</h3>
  *

core/java/android/preference/PreferenceCategory.java

@@ -24,6 +24,13 @@ import android.util.AttributeSet;
 /**
  * Used to group {@link Preference} objects
  * and provide a disabled title above the group.
+ * 
+ * <div class="special reference">
+ * <h3>Developer Guides</h3>
+ * <p>For information about building a settings UI with Preferences,
+ * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a>
+ * guide.</p>
+ * </div>
  */
 public class PreferenceCategory extends PreferenceGroup {
     private static final String TAG = "PreferenceCategory";

core/java/android/preference/PreferenceFragment.java

@@ -75,6 +75,13 @@ import android.widget.ListView;
  * preference in the current hierarchy, see
  * {@link #onPreferenceTreeClick(PreferenceScreen, Preference)}.
  * 
+ * <div class="special reference">
+ * <h3>Developer Guides</h3>
+ * <p>For information about using {@code PreferenceFragment},
+ * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a>
+ * guide.</p>
+ * </div>
+ *
  * <a name="SampleCode"></a>
  * <h3>Sample Code</h3>
  *

core/java/android/preference/PreferenceGroup.java

@@ -33,6 +33,13 @@ import android.util.AttributeSet;
  * {@link Preference} objects. It is a base class for  Preference objects that are
  * parents, such as {@link PreferenceCategory} and {@link PreferenceScreen}.
  * 
+ * <div class="special reference">
+ * <h3>Developer Guides</h3>
+ * <p>For information about building a settings UI with Preferences,
+ * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a>
+ * guide.</p>
+ * </div>
+ * 
  * @attr ref android.R.styleable#PreferenceGroup_orderingFromXml
  */
 public abstract class PreferenceGroup extends Preference implements GenericInflater.Parent<Preference> {

core/java/android/preference/PreferenceScreen.java

@@ -75,6 +75,13 @@ import android.widget.ListView;
  * clicked will show another screen of preferences such as "Prefer WiFi" (and
  * the other preferences that are children of the "second_preferencescreen" tag).
  * 
+ * <div class="special reference">
+ * <h3>Developer Guides</h3>
+ * <p>For information about building a settings UI with Preferences,
+ * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a>
+ * guide.</p>
+ * </div>
+ *
  * @see PreferenceCategory
  */
 public final class PreferenceScreen extends PreferenceGroup implements AdapterView.OnItemClickListener,